diff --git a/docs/Project.toml b/docs/Project.toml
index a4792157b..264509c96 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -12,4 +12,5 @@ Documenter = "0.27"
 KernelFunctions = "0.10"
 Kronecker = "0.4, 0.5"
 PDMats = "0.11"
+Statistics = "1"
 julia = "1.3"